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  Substring indexes off in simple map reading program  (Read 649 times)
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Offline CyanPrime
« Posted 2010-10-19 20:30:41 »

Alright, so I'm trying to create a simple RPG game, and my map reading code seems to be off.
This is the map reading line:
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    Integer.parseInt(map.data.substring(Map.MAP_START + ((playerPOS - map.width)/2) - 1, Map.MAP_START + ((((playerPOS - map.width)/2) - 1) + map.dataLen)));

Now the only tiles in the map are 01 and 00, so when I see a 10 I know something is wrong:
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    (playerPOS - map.width) = 34 playerPOS = 50 player.x = 2 player.y = 3 blah = 0
    (playerPOS - map.width) = 18 playerPOS = 34 player.x = 2 player.y = 2 blah = 10

Here is the map reading code:
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    public void init(GameContainer gc) throws SlickException {
          map = new Map();
          player = new Player();
         
          keys = new boolean[ALL_KEYS];
          for(int i = 0; i < ALL_KEYS; i++){
             keys[i] = false;
          }
         
          file = new File("testmap.txt");
         
          try {
             fin = new FileInputStream(file);
   
             bin = new BufferedInputStream(fin);
             StringBuilder sb = new StringBuilder();
             int ch = 0;
             
             while ((ch=bin.read())!=-1) {
                sb.append((char)ch);
             }
             
             map.data = sb.toString().replace(" ", "").replace("\n", "").replace("\r", "");
             System.out.print(map.data);
         
             map.width = Integer.parseInt(map.data.substring(map.dataOffs, map.dataOffs + map.dataLen));
             map.dataOffs += map.dataLen;
             
             map.height = Integer.parseInt(map.data.substring(map.dataOffs, map.dataOffs + map.dataLen));
             map.dataOffs += map.dataLen;
          }
          catch (Exception e) {
             e.printStackTrace();
          }
         
          tiles = new Image("tiles.png");
          hero = new Image("hero.png");
       }

and here is the map file:
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    16 12
    01 01 01 01 01 01 01 01 01 01 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 01 01 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 01 01 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    01 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

So if anymore info is needed let me know.
Offline BoBear2681

JGO Coder


Medals: 19



« Reply #1 - Posted 2010-10-19 21:38:41 »

Maybe something like this:

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BufferedReader r = new BufferedReader(new FileReader(file));

String line = r.readLine();
String[] tokens = line.split("\\s+");
int cols = Integer.parseInt(tokens[0]);
int rows = Integer.parseInt(tokens[1]);
int[][] mapData = new mapData[rows][cols];

for (int i=0; i<rows; i++) {
   line = r.readLine();
   tokens = line.split("\\s+");
   for (int j=0; j<cols; j++) {
      mapData[i][j] = Integer.parseInt(tokens[j]);
   }
}

r.close();

Offline CyanPrime
« Reply #2 - Posted 2010-10-20 06:51:09 »

Ahh, I didn't think of doing it like that. Thank you very much ^_^
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